Yield Strength Approach to Evaluate the Triggering of Liquefaction for Sloping Ground
The yield strength ratio concept, Su(yield)/σ’vo (Olson & Stark, 2003) and the cyclic strength ratio CRR (Seed et al, 1984) remain the main approaches of assessing triggering of liquefaction resistance for sloping ground. The Kα correction factor (Seed, 1983) has been extensively studied for considering the effect of the initial static stress on the triggering of liquefaction of sloping ground. Based on a suite of liquefaction triggering analyses, these most-commonly used cyclic stress methods, Seed et al. (2003)/Cetin et al. (2004) and Idriss and Boulanger (2008), are compared to the yield strength ratio approach (Olson and Stark 2003; Olson et al. 2006; Mesri 2007; and Olson and Zitny 2012), and the efficacy of the yield strength ratio is demonstrated. For validation of the comparison, one Mw 7.0 Haiti (2010) earthquake flow failures cases (North River near Dechapelle), (Olson et al., 2010) was selected to estimate the triggering of liquefaction and post-liquefaction resistance.
Author: Alfonso Cerna-Díaz
